S
M
T
W
T
F
S
26
60°
40°
27
63°
36°
28
65°
26°
29
66°
30°
30
67°
26°
1
64°
34°
2
65°
27°
3
72°
28°
4
67°
49°
5
54°
38°
6
62°
31°
7
71°
19°
8
77°
31°
9
81°
33°
10
76°
38°
11
83°
28°
12
87°
34°
13
83°
46°
14
76°
37°
15
80°
49°
16
78°
51°
17
73°
43°
18
67°
45°
19
75°
43°
20
79°
43°
21
82°
45°
22
78°
46°
23
85°
50°
24
86°
59°
25
86°
60°
26
88°
51°
27
89°
53°
28
89°
52°
29
93°
60°
30
94°
59°
31
95°
60°
1
96°
63°
2
87°
58°
3
85°
58°
4
84°
59°
5
88°
59°
6
88°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Round Rock
Round Rock's May 2026 forecast shows daily high temperatures ranging from 75° to 96°, with overnight lows between 43° and 63°. The average high for May is 87° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Round Rock. See also: June | July | August.
